;  ###----------------------------------------------------------------###
;  # file	: exc010.u						#
;  # date	: Mar 26 1996						#
;  # descr.	: functional test for mips				#
;  ###----------------------------------------------------------------###

	;  ###--------------------------------------------------------###
	;  #   exceptions :						#
	;  #     - illegal instruction (when executing a mtc0)  	#
	;  ###--------------------------------------------------------###

new_sr		.equ	0x00000000		; try to set system mode
		.org	0x00400000
		.start	init

init:
		loadi	r1 , new_sr		; init. r2 with the desired
						;+value of sr

	;  ###--------------------------------------------------------###
	;  #   move r1 into sr. This must generate an exception		#
	;  # (privileged instruction)					#
	;  ###--------------------------------------------------------###
                loadi   r31,back_from_exception
		mtc0	r1, status			; EXCEPTION (privileged)
		nop
		j	bad
		nop

back_from_exception:
                loadi   r31,good 
		rfe					; EXCEPTION (privileged)
		nop
		j	bad
		nop

		.org	0x004000d0
good:		j	good
		nop
bad:		j	bad
		nop

		.end